澳洲去日本大約幾多錢

Sydney to Osaka only JETSTAR will do (but have to stop Gold Coast)

You can choose some other Airline because have to transit.
Singapore Airline; China Airline; Cathay Pacific (Qantas also fly Jestar)

What passport you hold?

now to 13NOV - low season
13th onward till some time next year will be higher.
Of course the highest period will be Christmas time and 1JAN new year.

Singapore Airline / Cathay will fly daily.
Singapore Airline tax will be higher around AUD460
Cathay Pacific tax will be chapeer around AUD245

China Airline will be the best fare ever; but have to overnight at Taipei at your own cost.

email to me if you need further assistance.

你是否指機票價錢？未有指明出發城市(柏斯，布里斯本，悉尼及墨爾本皆不同)，及目的城市 (東京，大阪，扎幌及福崗又不同)，旺季和淡季又不同。以悉尼至東京為例，一般(經濟客位)約 A$1,000-A$1,500(成人)，此價錢只作参考(又視乎航空公司)。

我認為澳洲的機場稅是全世界最融(貴)的。